Reaction tube



FIG. 1 is a front, top and right side perspective view of an reaction tube showing our new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof;

FIG. 8 is a cross-sectional view taken along lines 8-8 in FIG. 2 thereof; and,

FIG. 9 is a cross-sectional view taken along lines 9-9 in FIG. 2 thereof.

The dashed-dot-dashed lines represent the boundary line of the claimed design. The broken lines shown in the drawings represent portions of the reaction tube that form no part of the claimed design. 

CLAIM We claim the ornamental design for a reaction tube, as shown and described. 